Creality Scan Ferret - light extension

A 'selfie light' for the ferret. It definitely fits on the Ferret Pro, but should also fit on the Ferret SE.

Please note the instructions for electrification!

There are two parts to print:

- Ferret-Light-Bottom v20.stl

- Ferret-Light-Top v20.stl

Print them with 0.16mm or 0.20mm layer height

Use normal-support on buildplate

2-3 walls

25% Infill

Now it gets tricky! Print the bottom part in the first 3 layers with transparent filament (PLA). To do this, add a 'pause command' after layer 3 when slicing, change the filament to a color of your choice (matt black is recommended) and finish printing this part. The top part is printed as normal, in one piece (if you don't want to print colorful stripes yourself ;-)

That was the easy part.

You will also need:

12x SMD LED, 5mm x 5mm, neutral white approx. 4500K (I used SMD 5050, these have 3 built-in LEDs in an SMD housing, with their own soldering pins - that makes 36 LEDs!!! see note below))

1x 3W resistor or 3x 1W resistor, the value is described below!

60cm copper wire, diameter between 0.6mm and 1mm, NOT THINNER!

1x socket 5.5mm x 2.1mm

1x plug 5.5mm x 2.1mm (there are short and long ones, the one with a 9.5mm plug is better, the short one)

1x USB cable, without data line, just cut it open and check whether there is only black and red inside)

1 strip of foam rubber, 1.8mm thick (the model is adapted like this), color black

Double-sided adhesive tape

Also:

1 soldering iron

Superglue gel (is better), 2-component glue also works very well

Sandpaper in medium and fine (75x100x5mm sanding sponges are great)

Tools for soldering

Some shrink tubing in the right sizes

Optional:

a USB distributor as a USB stick with 2 outputs for the Ferret's built-in battery.

Notes on electrification:

USB power is used, which comes from the built-in battery in the handle of the Scan Ferret or an extra power bank. There are 12 SMD LEDs installed, in my case even 12x SDM LED 5050, each of which has 3 tiny LEDs in a housing, which makes a total of 36 LEDs. With 20mAh of current per LED you should keep an eye on the current, it should stop at 1Ah (USB current). I deliberately did not solder each individual 5050 completely, some only with one contact, I ended up with 20 LEDs in total (the ones 'in the corners' are full).

Regarding the resistors. With 12 LEDs, 3.6V, 20mAh this results in a series resistor of 5.833 Ohm, use the next highest value! Of this, 0.336W is used for the resistor, but be sure to use a 3W resistor anyway, it gets warm, believe me. With my 20 LEDs this results in a minimum resistance of 3.5 Ohm with 0.56W dissipation on the resistor. With a full 36 LEDs, that's already 1.008W on the resistor with a minimum size of 2 Ohm. That's the theory.

Just use at least twice the resistor size. I didn't have any 3W resistors, and I don't even know if they're too big. I soldered 3x20 Ohm in parallel and simply connected them in series with the parallel chain wherever there was space, see diagram.

Please calculate all values again before assembly. In theory, 2W resistors should be enough, but my thermometer told me that with 2 pieces, the resistor reached 55 degrees after 10 minutes. THAT'S WHY 3W resistors should be used in the PLA housing.

But against all resistance, I wanted to talk about resistors.

Use at your own risk. I ASSUME NO LIABILITY FOR DAMAGE TO YOUR SCANNER! Expressly!!

Creality Scan Ferret - Light Extension

0.16mm layer, 2 walls, 15% infill

0.16mm layer, 2 walls, 15% infill

0.2mm layer, 3 walls, 15% infill